MOSEL VITELIC
V53C818H
Truth Table
Function
RAS
LCAS UCAS
WE
X
OE
X
ADDRESS I/O
Notes
Standby
H
L
L
H
L
L
H
L
X
High-Z
Data Out
Read: Word
Read: Lower Byte
H
L
ROW/COL
ROW/COL
H
H
L
Lower Byte, Data-Out
Upper Byte, High-Z
Read: Upper Byte
L
H
L
H
L
ROW/COL
Lower Byte, High-Z
Upper Byte, Data-Out
Write: Word (Early-Write)
Write: Lower Byte (Early)
L
L
L
L
L
L
L
X
X
ROW/COL
ROW/COL
Data-In
H
Lower Byte, Data-In
Upper Byte, High-Z
Read: Upper Byte (Early)
L
H
L
L
X
ROW/COL
Lower Byte, High-Z
Upper Byte, Data-In
Read-Write
L
L
H→L
H→L
H→L
L
L
H→L
H→L
H→L
L
H→L
H
L→H
ROW/COL
COL
Data-Out, Data-In
Data-Out
1, 2
2
EDO Page-Mode Read
EDO Page-Mode Write
EDO Page-Mode Read-Write
Hidden Refresh Read
RAS-Only Refresh
CBR Refresh
L
L
X
L
L
COL
Data-In
2
L
L→H→L
L
H→L
H
L→H
L
COL
Data-Out, Data-In
Data-Out
1, 2
2
ROW/COL
ROW
H
H
X
X
High-Z
H→L
L
L
X
X
X
High-Z
3
Notes:
1. Byte Write cycles LCAS or UCAS active.
2. Byte Read cycles LCAS or UCAS active.
3. Only one of the two CAS must be active (LCAS or UCAS).
V53C818H Rev. 1.2 May 1997
8
MOSEL [ MOSEL VITELIC, CORP ]
